JPH0762742A - Fixing method for pedestal of steelwork pillar in precast reinforced concrete pillar - Google Patents

Abstract

PURPOSE:To smoothly transmit stress by fixing a steelwork pillar pedestal part in a PC pillar in one body with a steelwork beam, and projecting the pedestal part from the upper end face of the PC pillar so as to join with an upper steelwork pillar. CONSTITUTION:The pedestal part 2 of a steelwork pillar B of an upper floor steelwork structure formed in one body with a steelwork beam 1 is fixed in a precast concrete pillar A of a reinforced concrete construction lower floor structure. The pedestal part 2 is projected from the upper end face of the precast concrete pillar A, and the projecting end part of the pedestal part 2 is joined with the steelwork pillar 3 of the upper floor structure through spliced plates 4 and high strength bolts 5. Consequently, stress of the steelwork pillar can be smoothly transmitted to the lower floor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of fixing a column base of a steel frame column in a precast reinforced concrete column in a building.

[0002]

2. Description of the Related Art Conventionally, the lower floor has a concrete structure,
When the upper floor had a light steel structure, the column base was designed as a pin. In addition, when fixing the pedestal, a neck wrapping or a metal fixture for fixing was used.

[0003]

However, in order to use the column base as a pin, the anchor bolt must be embedded in the reinforced concrete column. Therefore, not only a considerable amount of time is required for the attachment work of the anchor bolt, but also the position of the anchor bolt is increased. It is difficult to secure accuracy. Also, in order to make the column base a fixed end,
There was a problem that the column base had to be solidified with concrete, and the work for this was complicated.

The present invention has been proposed in view of the above problems of the prior art, and the purpose thereof is to clearly explain the transmission of stress in a composite structure of a lower floor reinforced concrete structure and an upper floor steel frame, It is an object of the present invention to provide a method for fixing a column base of a steel frame column in a precast reinforced concrete column in which the amount of steel frame is significantly reduced and the construction cost is reduced by economically designing an upper steel frame steel member.

[0005]

In order to achieve the above object, according to the method of fixing the column base of the steel frame column in the precast reinforced concrete column according to the present invention, the lower floor structure of the reinforced concrete structure and the upper floor structure of the steel frame structure are provided. In a structure consisting of, and while fixing the column base of the steel column integrally with the steel beam in the precast concrete column made of reinforced concrete in the lower floor structure, projecting the column leg from the upper end surface of the precast concrete column, The projecting portion of the column leg is joined to the steel column of the upper floor structure.

[0006]

According to the present invention, as described above, the column base portion of the steel frame column to which the steel beam is integrally connected is fixed in the precast concrete column made of reinforced concrete in the lower floor structure, and the column top surface By connecting the column base projecting portion and the upper floor steel column in the upper floor structure of the steel frame, the column base portion of the upper floor steel column becomes a rigid joint by the steel beam and the reinforced concrete, and the upper floor steel frame The stress of the steel column is smoothly transmitted to the lower floor.

[0007]

The present invention will be described below with reference to the illustrated embodiments. A is a precast concrete column made of reinforced concrete in a lower floor structure of reinforced concrete and forms a column base portion 2 of a steel column B in an upper floor steel structure integrally formed with the steel beam 1 in the column A. The column base 2 is made to project from the upper end surface of the column A, and the projecting end of the column base 2 is joined to the steel column 3 in the upper floor structure of the steel frame through the attachment plate 4 and the high-strength bolt 5. To do.

In the figure, 6 is an upper steel beam, and 2a is a column base embedded portion. In the illustrated embodiment, as described above, the column base portion 2 joined to the steel column 3 of the upper steel structure part via the attachment plate 4 and the high-strength bolt 5 is joined to the steel beam 1 to make the reinforced concrete structure. By being fixed in the precast concrete column A in the lower floor structure, the steel column of the upper floor steel structure is rigidly joined to the lower reinforced concrete column, and the stress transmission between them is smoothly performed.

[0009]

According to the present invention, as described above, in the precast concrete column made of reinforced concrete in the lower floor structure of reinforced concrete, the column base portion of the steel column integrally formed with the steel beam is fixed, and By connecting the protrusion from the upper end surface of the precast concrete column in the same column base and the upper floor steel column in the steel structure upper floor structure, the column base of the upper floor steel column and the lower floor reinforced concrete column are It is rigidly joined. As a result, the stress of the upper floor steel pillar is smoothly transmitted to the lower floor, the stress analysis becomes clear, and the steel members constituting the upper floor structure of the steel frame structure can be economically designed, the amount of steel used can be reduced, and the construction cost can be reduced. It can be saved.

Further, since the structure of the column base is simpler than the conventional one and the degree of fixing is secured, the upper structure can cope with stress and deformation with a small member.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a column base fixing portion of a steel frame column in precast reinforced concrete constructed by the method of the present invention.

FIG. 2 is an arrow view of FIG.

FIG. 3 is a perspective view of FIG. 1.

[Explanation of symbols]

 A Precast concrete column B Steel column C Floor 1 Steel beam 2 Column base 2a Column base embedded part 3 Steel column 4 Mounting plate 5 High-strength bolt 6 Upper floor steel beam

Claims (1)

[Claims] 1. A structure comprising a reinforced concrete lower floor structure and a steel frame upper floor structure, wherein a column base portion of the steel column is integrally formed with the steel beam in a precast concrete column made of reinforced concrete in the lower floor structure. A column of a steel column in a precast reinforced concrete column, characterized in that the same column leg is projected from the upper end surface of the precast concrete column, and the protrusion of the column column and the steel column of the upper floor structure are joined together. Leg fixing method.